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Acrylonitrile catalyst and preparation method and application thereof

An acrylonitrile catalyst and oxide technology, which is used in catalyst activation/preparation, hydrocarbon ammoxidation preparation, chemical instruments and methods, etc., to achieve the effects of reducing load, improving device operation period and prolonging catalyst life.

Active Publication Date: 2019-05-21
YINGKOU XIANGYANG CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since most of the acrylonitrile plants have undergone capacity expansion and transformation, the production capacity has increased by 60% on the original basis, and the main equipment of these plants has not changed

Method used

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  • Acrylonitrile catalyst and preparation method and application thereof
  • Acrylonitrile catalyst and preparation method and application thereof
  • Acrylonitrile catalyst and preparation method and application thereof

Examples

Experimental program
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no. 1 approach

[0050] The first embodiment of the present invention provides an acrylonitrile catalyst comprising a metal oxide represented by the following general formula (1),

[0051] Bi a Fe b Ni c Mg d Ce e A f B g C h Mo 12 o x (1)

[0052] in:

[0053] A is one or more elements selected from the group consisting of lithium, sodium, potassium, rubidium and cesium;

[0054] B is one or more elements selected from the group consisting of praseodymium, europium, terbium, and dysprosium;

[0055] C is one or two elements selected from the group consisting of vanadium and cadmium;

[0056] a, b, c, d, e, f, g and h represent the number of atoms of each element;

[0057] a is 1.2 to 3.0;

[0058] b is 1.0 to 2.7;

[0059] c is 3 to 8;

[0060] d is 0.3 to 1.6;

[0061] e is 0.4~1.8;

[0062] The contents of f, g and h are respectively 0.01-0.4;

[0063] x is the number of oxygen atoms required to satisfy the valence of other elements.

[0064] One of the purposes of this...

no. 2 approach

[0078] The second embodiment of the present invention provides a method for preparing the acrylonitrile catalyst of the first embodiment, specifically comprising the following steps:

[0079] Preparation process: taking the raw materials for preparing the acrylonitrile catalyst, dissolving them in water and mixing them with the carrier to obtain the precursor slurry;

[0080] Drying process: drying the precursor slurry to obtain dry particles;

[0081] Roasting process: roasting the dry particles to obtain a roasted product;

[0082] Preferably, the conductivity of the water is less than 1 μs / cm.

[0083] The invention can make the conductivity of water less than 1 μs / cm by using sand filtration, active carbon adsorption and membrane permeation filtration.

[0084] Specifically, in the preparation step, the soluble active component raw material can be dissolved into a certain amount of pure water with a conductivity less than 1 μs / cm to make a mixed solution, and then mixed ...

no. 3 approach

[0092] The third embodiment of the present invention provides an application of the acrylonitrile catalyst of the first embodiment of the present invention or the acrylonitrile catalyst prepared by the preparation method of the second embodiment in the preparation of acrylonitrile by ammoxidation of propylene.

[0093]Specifically, the acrylonitrile catalyst of the present invention can produce acrylonitrile using a fluidized bed. Acrylonitrile catalyst can be used in continuous production process or batch production process, but it is best to choose continuous production process when using large reactors. In addition, it is desirable to periodically regenerate or activate the acrylonitrile catalyst, for example by blowing air at a certain temperature to achieve this.

[0094] The reactants required to prepare acrylonitrile by using the acrylonitrile catalyst of the present invention are oxygen, ammonia, propylene and their mixtures. The required oxygen can be pure oxygen or ...

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Abstract

The invention provides an acrylonitrile catalyst and a preparation method and application thereof. The acrylonitrile catalyst comprises a metal oxide (BiaFebNicMgdCeeAfBgChMo12Ox (1)) represented by the following general formula (1), wherein A is one or more elements selected from the group consisting of lithium, sodium, potassium, rubidium, and cesium; B is one or more elements selected from thegroup consisting of praseodymium, europium, terbium and dysprosium; C is one or two elements selected from the group consisting of vanadium and cadmium; a, b, c, d, e, f, g and h represent the numberof atoms of each element; a is 1.2 to 3.0; b is 1.0 to 2.7; c is 3 to 8; d is 0.3 to 1.6; e is 0.4 to 1.8; the contents of f, g and h are respectively 0.01 to 0.4; x is the number of oxygen atoms required to satisfy the valency of other elements. The acrylonitrile catalyst has the following effects: 1) the requirement of high catalyst load of an industrial energy expansion device can be met; 2) the production amount of the carbonyl compound acrolein and acrylic acid is reduced, and the operation period of the device is prolonged.

Description

technical field [0001] The invention relates to an acrylonitrile catalyst, a preparation method and application thereof, and belongs to the field of catalysts. Background technique [0002] Acrylonitrile (AN) is a raw material monomer for synthetic fiber acrylic fibers, and is also a raw material for thermoplastic synthetic resins such as ABS and SAN, nitrile rubber, adiponitrile, acrylamide and other derivatives, and is one of the important products of petrochemical industry . The process technology of propylene ammoxidation to produce acrylonitrile has become increasingly mature, and the development of acrylonitrile catalysts with excellent performance is a hot spot in the acrylonitrile industry. [0003] Regarding the stability of the catalyst, the current catalyst can run continuously for 4-5 years in the fluidized bed reactor without the need to be replaced as a whole, which is significantly improved compared to the past, which can only be used for 1-1.5 years and need...

Claims

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Application Information

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IPC IPC(8): B01J23/887B01J35/10C07C253/26C07C255/08
CPCY02P20/52C07C255/08C07C253/26B01J23/887B01J35/60B01J23/8876B01J37/0201B01J37/08C07C255/06B01J35/40B01J35/635
Inventor 王立才
Owner YINGKOU XIANGYANG CATALYST
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